Prime Minister John Key said the Labour MPs had displayed "deep hypocrisy'' after accusing the Government of being too close to SkyCity over the casino company's plans to build a $400 million convention centre in Auckland in return for concessions on gambling laws.

"These guys have been running around parading as if they're holier than thou, telling everybody how terrible SkyCity is and how the sky was going to cave in because a convention centre was being built and the moment we turn our back they are taking their sausage rolls and free beers in their box watching the All Blacks play,'' he said today.

"I think they have been caught out, I think they are very embarrassed by the fact that they have been deeply hypocritical and I think New Zealanders will judge them very badly for this.''

Mr Key said if Labour was true to what it was saying, the MPs wouldn't support SkyCity in any way.

"They have got to have a consistent position. If Greenpeace had a box at an All Blacks game, I wouldn't be attending.''

Mr Key believed "without a doubt'' that Labour would take a donation from SkyCity at the next election.

Justice Minister Judith Collins said she would be very happy to be invited to the SkyCity box.

"But then, I'm not a hypocrite like (Labour). I think they're a bunch of hypocrites and actually they should stop slagging off SkyCity and being very happy to take their hospitality.